Jim.Hendee at noaa.gov
Fri Dec 7 06:55:16 EST 2001
<owner-coral-list at coral.aoml.noaa.gov>
Date: Fri, 7 Dec 2001 12:34:19 -0300
To: coral-list at coral.aoml.noaa.gov
From: Bernard THOMASSIN <Bernard.Thomassin at com.univ-mrs.fr>
Subject: Impact of catching of fish postlarvae in reefs and lagoons
In the Mayotte island (north Mozambique Channel, Comoro Archip.), a
new company is planning to catch coral reefal and lagoonal fish
postlarvae to grow them for the fish trade of european aquariologists.
To do that due to the high tidal range there (up to 4 meters during
spring tides) they exclude the using of "crest nets" moored upon the
barrier reef fronts as used in lower tidal range environments (for
example, Moorea Is. in French Polynesia).
Consequently they plan to used ligh traps in subsurface of the
lagoonal waters, or in passages, or yet upon barrier reefs (light
traps are known to select the catches to Apogonids and Pomacentrids
As I am not familiar with coral and lagoonal fish postlarvae
behaviour, could you help me in advisoring give me our opinions (or
your experiments) about the possible impacts of to the natural fish
populations (species selection, biomass impact, etc...).
Mayotte is a quite large lagoon (near 1,500 square kilometers, ribbon
barrier reefs are near 167 km long with deep passages - 30 up to 70 m
depths). The corals from the barrier reefs died at 90 percent
following the 1998 ENSO event and today they recover slowly...
Fringing reefs have just the reef fronts living.
Thanks for your comments.
Bernard A. THOMASSIN (Dr. ès-Sci.)
Directeur de recherches CNRS
Centre d'Océanologie de Marseille (C.O.M.), Station marine d'Endoume,
Chemin de la batterie des Lions,
13007 Marseille, France
"Environnement marin & littoral de l'île de Mayotte"
tél. (33) 04 91 04 16 17 (ligne directe)
(33) 04 91 04 16 00 (standart)
mobile (33) 06 63 14 91 78
fax (33) 04 91 04 16 35 (à l'attention de....)
Proverbe mahorais : "Pwedza arongoa tsiamini paka nitsoana"
traduction : "Le poulpe a dit : je ne crois que si je vois"
For directions on subscribing and unsubscribing to coral-list or the
digests, please visit www.coral.noaa.gov, click on Popular on the
menu bar, then click on Coral-List Listserver.
More information about the Coral-list-old